I'm trying to learn to read apple schematics and I have a few question regarding components and lines. I have circled areas of the image below and numbered them according to the question I'll ask.
In red 1: FL6_RF and FL8_RF, are these 2 low pass filter?
In green 2: L2_RF and L3_RF, what are those 2 inductor for?
In Blue 3: C49_RF and C14_RF, why use 2 cap?
In multiple yellow circle 4: The line VSD2_1V8, I'm confused with whether its In or Out line coming or going from pins VSD2_1 and VSD2_2, or from VDD_OSD2. There's another VSD2_1V8 on the same page that is link to R13_RF, where does it come from? And does 1v8 means 1.8v?
I see a lot of lines with PWR500,PWR50 or PWR10. What does it mean?
Sorry if my question seems elementary and thank you to all that helps.